dt-bindings: mfd: mt6397: Add binding for MT6357

Add binding documentation for the MT6357 PMIC.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20221005-mt6357-support-v3-1-7e0bd7c315b2@baylibre.com

Documentation/devicetree/bindings/mfd/mt6397.txt

@@ -21,6 +21,7 @@ Required properties:
 compatible:
 	"mediatek,mt6323" for PMIC MT6323
 	"mediatek,mt6331" for PMIC MT6331 and MT6332
+	"mediatek,mt6357" for PMIC MT6357
 	"mediatek,mt6358" for PMIC MT6358 and MT6366
 	"mediatek,mt6359" for PMIC MT6359
 	"mediatek,mt6397" for PMIC MT6397